Calculated
Glider Drags at Different Speeds and Gee Loads 





















Glider 
Specs: 


Best L:D 

40 

Drag @ Best speed & 1 gee 







@ Speed of 

100 

Induced Drag 

10 











Weight 

800 

Friction Drag 

10 











Stall Speed 

60 

Negative Gee Drag Factor 

1.4 











Inverted Stall Speed 

90 

Chart Gee Start 

3 









Chart Speed Increment 

25 

Chart Gee Increment 

0.5 
















Drag 
Chart: 






Speeds > 
50 
75 
100 
125 
150 
175 
200 
225 








Gee Load v 






3 
STALL 
STALL 
STALL 
STALL 
STALL 
84.0 
87.5 
95.8 

2.5 
STALL 
STALL 
STALL 
STALL 
70.4 
71.4 
77.9 
88.2 

2 
STALL 
STALL 
STALL 
STALL 
56.4 
61.2 
70.0 
81.9 

1.5 
STALL 
STALL 
STALL 
42.0 
45.5 
53.2 
63.9 
77.1 

1 
STALL 
STALL 
28.0 
30.8 
37.7 
47.4 
59.5 
73.6 

0.5 
STALL 
14.1 
17.5 
24.1 
33.1 
44.0 
56.9 
71.6 

0 
3.5 
7.9 
14.0 
21.9 
31.5 
42.9 
56.0 
70.9 

0.5 
12.5 
10.1 
12.5 
17.2 
23.6 
31.4 
40.6 
51.1 

1 
STALL+ 
23.4 
20.0 
22.0 
26.9 
33.9 
42.5 
52.6 

1.5 
STALL+ 
45.6 
32.5 
30.0 
32.5 
38.0 
45.6 
55.1 

2 
STALL+ 
STALL+ 
50.0 
41.2 
40.3 
43.7 
50.0 
58.5 

2.5 
STALL+ 
STALL+ 
72.5 
55.6 
50.3 
51.0 
55.6 
63.0 

3 
STALL+ 
STALL+ 
STALL+ 
73.2 
62.5 
60.0 
62.5 
68.4 

3.5 
STALL+ 
STALL+ 
STALL+ 
94.0 
76.9 
70.6 
70.6 
74.8 

4 
STALL+ 
STALL+ 
STALL+ 
118.0 
93.6 
82.9 
80.0 
82.2 

4.5 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
112.5 
96.7 
90.6 
90.6 

5 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
133.6 
112.3 
102.5 
100.0 

5.5 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
156.9 
129.4 
115.6 
110.4 

6 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
182.5 
148.2 
130.0 
121.7 

6.5 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
168.6 
145.6 
134.1 

7 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
190.6 
162.5 
147.4 

7.5 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
214.3 
180.6 
161.7 

8 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
STALL+ 
239.6 
200.0 
177.0 





Notes: Units can be varied, though Lbs and feet /
second could represent a modern 1 seater. 



Friction drag assumed
proportional to speed squared 



Induced drag assumed
proportional to lift squared and inverse to speed squared 




Taras K 
April 2002 










































